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4. Effect of taurine and gold nanoparticles on the morphological and molecular characteristics of muscle development during chicken embryogenesis

Author

Zielinska, Marlena, Sawosz, Ewa, Grodzik, Marta, Balcerak, Marek, Wierzbicki, Mateusz, Skomial, Jacek, Sawosz, Filip, Chwalibog, André, Zielinska, Marlena, Sawosz, Ewa, Grodzik, Marta, Balcerak, Marek, Wierzbicki, Mateusz, Skomial, Jacek, Sawosz, Filip, and Chwalibog, André

Abstract

The objective of the present investigation was to evaluate the effects of taurine and Au nanoparticles on the expression of genes related to embryonic muscle development and on the morphological characteristics of muscles. Fertilised chicken eggs (n = 160) were randomly divided into four groups: without injection (Control) and with injection of Au nanoparticles (NanoAu), taurine (Tau) or Au nanoparticles with taurine (NanoAu + Tau). The experimental solutions were given in ovo, on the third day of incubation, by injecting 0.3 ml of the experimental solution into the air sack. The embryos were evaluated on the 20th day of incubation. The methods included gene expression at the mRNA and protein levels, immunohistochemistry, histology and microscopy. In groups NanoAu, Tau and NanoAu + Tau, the muscle structure and the number of muscle cells were affected. Furthermore, taurine increased fibre diameter, the total number of nuclei, the proportion of proliferating cell nuclear antigen (PCNA)-positive cells and the total cell number. Also, gene expression of basic fibroblast growth factor-2 and PCNA was downregulated. There were no significant interactions between NanoAu and taurine, indicating that NanoAu did not enhance the effects of taurine. It may be concluded that 20 days after injection, NanoAu affected some parameters of muscle development, but the most profound effects were those of taurine.

Published
2012

6. COMPENSATORY GROWTH OF PIGS: QUANTITATIVE AND QUALITATIVE PARAMETERS OF PORK CARCASS OF FATTENERS ADMINISTERED A MIXTURE WITH LINSEED OIL IN THE RE-ALIMENTATION PERIOD.

Author

Więcek, Justyna, Skomial, Jacek, Rekiel, Anna, Florowski, Tomasz, Dasiewicz, Krzysztof, and Woźniak, Agnieszka

Subjects
*MEAT quality, *LINSEED oil, *SWINE, *PROTEINS, *LIVESTOCK carcasses, *FLAXSEED
Abstract

An experiment conducted on 56 fatteners was aimed at determining the effect of compensatory growth and addition of linseed oil in the II period of fattening on their slaughter value and meat quality. On termination of the I fattening period (23-60 kg b.w.) carcasses of animals fed in that period with a restrictive diet (-25% of diet), as compared to those of animals fed semi ad libitum, were characterised by greater meatiness (p≤0.05), lower fat content of longissimus thoracis, smaller free drip as well as higher values of chewiness and hardness. After the re-alimentation period, in which the animals were fed semi ad libitum with mixtures containing 0 or 4% of linseed oil, the greatest meatiness was observed in the pigs fed with a restrictive diet in the I fattening period and with a mixture containing 0% of linseed oil in the II fattening period. The restrictive-compensatory feeding strategy was found to exert a positive effect on contents of dry matter and total protein in longissimus thoracis and to have a negative impact on texture parameters of longissimus lumborum. The addition of linseed oil to feed mixtures caused a decrease in carcass meatiness (p≤0.05) and an increase in meat springiness (p≤0.05). [ABSTRACT FROM AUTHOR]

Published
2008

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